Temperature can alter not only the properties of a strain gage element. a change in the resistivity or in the
temperature coefficient of resistance of the strain gage element changes the zero
reference used to calibrate the unit. For example. change their internal structure at high
temperatures. such as copper.
Expansion or contraction of the strain-gage element and/or the base material introduces
errors that are difficult to correct.
.
Differences in expansion coefficients between the gage and base materials may cause
dimensional changes in the sensor element.Strain gages
Temperature and the Gage Factor
Strain-sensing materials. but
also can alter the properties of the base material to which the strain gage is attached.